问题
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1,2,3/2,8/5,5/3,12/7,() A.10/7 B.11/7 C.14/8 D.13/8
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2/5,5/8,8/11,() A.5/6B.11/14C.6/7D.13/15
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1,2,3/2,8/5,5/3,12/7,() A.10/7 B.11/7 C.14/8 D.13/8
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2/13,4/11,2/3,8/7,2,()。 A.4/5 B.4C.5/3 D.3
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2/5,5/8,8/11,() A.5/6B.11/14C.6/7D.13/15
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乳膏剂酸碱度一般控制在pH在A.4.2~11.0B.3.5~7.3C.4.4~8.3D.5.1~8.8E.6.3~9.5